Withdrawal device for a shaft furnace
AssigneeDeutsche Voest-Alpine Industrieanlagenbau GmbH
InventorsMartin Schmidt, Herbert Lassnig, Johann Wurm, Kurt Wieder, Georg Aichinger, Josef Ziegler
Life of this patent
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Abstract
The invention relates to a shaft furnace (1), in particular a direct-reduction shaft furnace, having a bed (2) of lumpy material, in particular lumpy material containing iron oxide and/or iron sponge, having worm conveyors (3) which penetrate through the shell of the shaft furnace for discharging the lumpy material from the shaft furnace (1), which conveyors are arranged above the base area of the shaft furnace (1) and are mounted in the shell of the shaft furnace.
Claims10
Shaft furnace (1), in particular direct-reduction shaft furnace, having a bed (2) of lumpy material, in particular lumpy material containing iron oxide and/or iron sponge, having worm conveyors (3) which penetrate through the shell of the shaft furnace for discharging the lumpy material from the shaft furnace, which conveyors are arranged above the base area of the shaft furnace (1) and are mounted in the shell of the shaft furnace (1), characterized in that the take-off region (5) of each worm conveyor (3), which projects into the shaft, in the longitudinal direction has at least two adjacent sections, the conveying cross sections of adjacent ends of these sections increasing suddenly in the direction of conveying.
Dependencies are inferred from the claim text.